﻿/*
BF4Rcon.NET, provides a .NET implementation of BF4's RCON interface.
Copyright (C) 2013 Tim Marro

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace TimScripts.BF4Rcon.Frostbite
{
    public class DataRequestCollection : IEnumerable<byte>
    {
        private readonly byte[] Data;
        private readonly int Offset;
        private readonly int Count;

        public DataRequestCollection(byte[] buffer, int offset, int count)
        {
            if (buffer == null)
                throw new ArgumentNullException("buffer");

            if (offset < 0)
                throw new ArgumentOutOfRangeException("offset");

            if (count < 0)
                throw new ArgumentOutOfRangeException("count");

            Data = buffer;
            Offset = offset;
            Count = count;
        }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1062:Validate arguments of public methods", MessageId = "0")]
        public DataRequestCollection(byte[] buffer)
            : this(buffer, 0, buffer.Length)
        { }

        private IEnumerable<byte> GetData()
        {
            for (int i = 0; i < Count; i++)
            {
                yield return Data[Offset + i];
            }
        }

        public IEnumerator<byte> GetEnumerator()
        {
            return GetData().GetEnumerator();
        }

        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
        {
            return GetData().GetEnumerator();
        }
    }
}
